security/wpa_supplicant-devel: Enable WEP by default

As of hostap 2.10, WEP is disabled by default. This of course is not a
bad thing but requires some planning and an announcment to remove WEP
support by default. At some point this option will default to off, to
coincide with the removal of WEP support from FreeBSD base.

MFH: 2022Q3